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Plastic sprinkler pipe installation

So do you require them not to install the heads till an inspection of the pipe is done, then screw the heads on?????
 

Sprinkler heads shall be installed only after all the CPVC

pipe and fittings, including the sprinkler head adapters, are

solvent welded and allowed to cure for a minimum of 30

minutes.

• Sprinkler head fittings should be visually inspected to

ensure that the water way and threads are clear of any

excess cement.

• Once the installation is complete and cured per Table I, II

or III (under Set and Cure Times), the system shall be

hydrostatically tested.

• Sprinklers shall not be installed in the fittings prior to the

​
fittings being cemented in place.

 
I know they are suppose to be taught to glue everything first

Then screw in the heads
 
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